One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

A tunnel with windows, so you don't miss out on the impressive views.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Despite its name, this route in southern Utah offers a heavenly day trip.

The fifth-longest natural arch in the world, and the longest outside China.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A fitting attraction for the corn capital of the world.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

The real "father of baseball" rests in Brooklyn.

This poignant display is now a memorial to these regionally extinct species.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

The home of the first American-born saint is one of the only curved buildings in New York.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

The home of aviation trailblazers, in a remote corner of the big city.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

"A hideous albatross in the Hudson River Valley."